Geoege b



(No Model'.)

(L B. POST.

- ENVELOPE.

No; 291,079, Patented Jan; 1 1884.

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WITNESSES ATTORNEY n. PETEns. mmnogm. Via-Mum m a STATE PATENT OFFICE.

GEORGE B. POST, on NEW YORK, N. Y.

ENVELOPE.

SPECIFIOATIONIorming part of Letters Patent No. 291,079, dated January 1, 1884:.

Application filed February 9,1B8 3. (No model.)

To all whom it may concern:

Be it known that I, GEORGE B. POST, a citi-v zen of the United States, residing in the city of New York, in the county and State of New York, have invented certain new and useful Improvements in Envelopes for Money and other Inclosures, of which the following is a specification.

The object of my invention is to provide a combined letter-sheet and envelope that can be cheaply made, will be convenient in use, and safe from surreptitious opening; and it consists in the peculiar construction andarrangement of the parts of said combined envelope and letter-sheet, as hereinafter, more fully described and claimed. In the drawings, Figure I represents the envelope blank entirely unfolded and flat, the vertical dotted lines and the horizontal lines representing the lines of folding. Fig. II. represents the blank after the first fold along the line a a in Fig. I. Fig. III represents the blank after first two folds. Fig. IV represents the blank after the third or last single fold, Fig. V represents the envelope after the corners are folded along the dotted line f d in Fig. IV. Fig. VI represents the envelope as completely folded and ready for fastening or sealing, the ends in Fig.V having been folded over along the lines cl (1. Fig. VII represents my preferred form for the indentations f f in the flap C. Fig. VIII represents an alternative form of the envelope-blank.

In the form preferred by me, I out the paper of which the envelope is to be made as shown in Fig. I, in which A is theeXtension-flap, that comes entirely within the envelopewhenfolded. B is the back flap, upon which the side flaps are folded and sealed. 0 is the address-face, having flaps at the end. D is the top flap. B and C are the main faces, being the outer faces when the envelope is folded. The extensionflap A is free from any gum or fastening, and prevents the inclosure, when pinned to it, from slipping. In the form shown the ends of the flaps A and B are each cut so as to leave the projections shown at A A and B B and preferably the projections at the lower edge of the flap A. In the flaps of the face 0, I cut away a narrow portion from each end, leaving apertures, (shown at f f in Fig.I,) preferably leaving the distance from the inner end of the cuts 1 f to the folding-lines d d greater than the dis tance between the inner sides of the cuts in A and B and the said folding-lines. My object in having this variation in the depths of the cuts is to have the flaps D, B, and O and the edges of the proj ections. G O O 0 all brought in contact with the adhesive material within a narrow space, as shown bythe dotted circle in Fig. VI. This object, it is obvious, can

also be attained by making the apertures in' the end of flapsof the face 0 deeper than the apertures in the flap B but this method brings the larger cut on the outside of the folded envelope, instead of beneath the flap 0, (shown in Fig.VII,) and requires a larger area of adhesive material. IVhen there is no variation in the distances from the cuts to the folding-lines d d, the bulk of the folded-over ends 0 0*, Fig. VI, is materially greater and either of the other forms is preferable. The form of the aperture f is not material, provided that it be of suitable size to be covered by the seal, and provided that through it, when the envelope is folded, can .be seen the parts hereinafter specified. The flap D, I prefer to out of a length equal to the distance between the folding-lines (Z (Z (1 cl, and of such width that when the envelope is folded its upper edge will be visible through the openings ff, as shown in Figs. VI and VII, and thus its long exposed edge will be securely held by the adhesive material placed as shown by the-dotted circles in Fig. VII. The first fold, when the envelope is to be fastened, is made along the line a a through the projections A A The second fold is along the line b b and through the projections formed of B O and B G. The third fold is along the line 0 c, and the flap D is folded over on the flap B, as shown in Fig. IV. By this method there is no joint at either top or bottom of the envelope, and both top and bottom are protected without the use of any adhesive material. are made along the dotted lines f (Z in Fig. IV, and are so made as to bring the edges of the projections O C and 0" 0" within the spaces f f, and so as to leave a space between the edges of such projections, as shown in Fig. V. The last fold is made along the line (1 cl, which is preferably within the flaps A, B, and G, and untouched by the apertures in said flaps. This secures each end of the envelope with a con The next folds tinuous paper covering without using any adhesive material. After the last fold is made, the adhesive material is used to hold the flap I) and the flaps of face 0 firmly down upon the flap B.

In Fig. VIII is shown an obvious modification in the form of niyinvention. In this form the upper corners of the envelope are protected by enlarging the projections 0 C, as shown in Fig. VIII, thus modifying the cutting of the flap D, and obviating the necessity of the projections at the ends of the line a a, as shown in Fig. I.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. Au envelope-blank in which the four flaps surrounding either one of the main faces B or G of the envelope are joined each to the adjacent flap by a corner extension of the blank beyond the angle of the said main face, and in which the side flaps of the address-face C have apertures cut in their ends, through which,whcn the envelope is folded, can be seen both the flaps B and D, and in which the side flaps of the face B and of the extension-flap A are cut away at the parts falling below the said apertures in the side flaps of C, substantially as described.

2. An envelope provided with the top flap,

3. An envelope-blank having the addressk face 0, back flap, B, top flap, l), and interior extension-flap, A,with side projections, A A, B C", A A and B C, and with the apertures ff in the ends of the address-face 0, substantially as described.

4. An envelope-blank having the address face 0, the flapsB and D, with apertures in the ends of the flap B, and with apertures in the ends of the flaps of the address-face O of less depth than the apertures in the flap B, and of such width that the edgesf of b of the address-face C may be folded over diagonally to come within the sides of the apertures ff, substantially as and for thcpurposes described.

GEO. B. POST.

\Vitnesses:

Janus O'ris, 'IiroMAs H UNI. 

